Commit 77613a2e authored by Matthew Brost's avatar Matthew Brost
Browse files

drm/xe/uapi: Add DRM_XE_QUERY_CONFIG_FLAG_HAS_CPU_ADDR_MIRROR 



Add the DRM_XE_QUERY_CONFIG_FLAG_HAS_CPU_ADDR_MIRROR device query flag,
which indicates whether the device supports CPU address mirroring. The
intent is for UMDs to use this query to determine if a VM can be set up
with CPU address mirroring. This flag is implemented by checking if the
device supports GPU faults.

v7:
 - Only report enabled if CONFIG_DRM_GPUSVM is selected (CI)

Signed-off-by: default avatarMatthew Brost <matthew.brost@intel.com>
Reviewed-by: default avatarHimal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: default avatarThomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: default avatarTejas Upadhyay <tejas.upadhyay@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250306012657.3505757-20-matthew.brost@intel.com
parent c73b2cbd

drivers/gpu/drm/xe/xe_query.c

+4 −1
Original line number Diff line number Diff line
@@ -338,8 +338,11 @@ static int query_config(struct xe_device *xe, struct drm_xe_device_query *query) 
	config->info[DRM_XE_QUERY_CONFIG_REV_AND_DEVICE_ID] =

		xe->info.devid | (xe->info.revid << 16);

	if (xe_device_get_root_tile(xe)->mem.vram.usable_size)

		config->info[DRM_XE_QUERY_CONFIG_FLAGS] =

		config->info[DRM_XE_QUERY_CONFIG_FLAGS] |=

			DRM_XE_QUERY_CONFIG_FLAG_HAS_VRAM;

	if (xe->info.has_usm && IS_ENABLED(CONFIG_DRM_GPUSVM))

		config->info[DRM_XE_QUERY_CONFIG_FLAGS] |=

			DRM_XE_QUERY_CONFIG_FLAG_HAS_CPU_ADDR_MIRROR;

	config->info[DRM_XE_QUERY_CONFIG_FLAGS] |=

			DRM_XE_QUERY_CONFIG_FLAG_HAS_LOW_LATENCY;

	config->info[DRM_XE_QUERY_CONFIG_MIN_ALIGNMENT] =

include/uapi/drm/xe_drm.h

+3 −0
Original line number Diff line number Diff line
@@ -395,6 +395,8 @@ struct drm_xe_query_mem_regions { 
 *      has usable VRAM

 *    - %DRM_XE_QUERY_CONFIG_FLAG_HAS_LOW_LATENCY - Flag is set if the device

 *      has low latency hint support

 *    - %DRM_XE_QUERY_CONFIG_FLAG_HAS_CPU_ADDR_MIRROR - Flag is set if the

 *      device has CPU address mirroring support

 *  - %DRM_XE_QUERY_CONFIG_MIN_ALIGNMENT - Minimal memory alignment

 *    required by this device, typically SZ_4K or SZ_64K

 *  - %DRM_XE_QUERY_CONFIG_VA_BITS - Maximum bits of a virtual address
@@ -412,6 +414,7 @@ struct drm_xe_query_config { 
#define DRM_XE_QUERY_CONFIG_FLAGS			1

	#define DRM_XE_QUERY_CONFIG_FLAG_HAS_VRAM	(1 << 0)

	#define DRM_XE_QUERY_CONFIG_FLAG_HAS_LOW_LATENCY	(1 << 1)

	#define DRM_XE_QUERY_CONFIG_FLAG_HAS_CPU_ADDR_MIRROR	(1 << 2)

#define DRM_XE_QUERY_CONFIG_MIN_ALIGNMENT		2

#define DRM_XE_QUERY_CONFIG_VA_BITS			3

#define DRM_XE_QUERY_CONFIG_MAX_EXEC_QUEUE_PRIORITY	4